Abaco Systems / VMIC VMIVME-2128-311 128-bit High-Voltage Digital Output Board with Built-In-Test

The Abaco Systems / VMIC VMIVME-2128-311 is a 128-bit high-voltage digital output board for VMEbus systems. It delivers open-collector output control across 128 channels with selectable 5 to 48 VDC output levels, 600 mA sink current per channel, and 55 V breakdown voltage rating. Built-in test logic enables software-controlled verification of each channel, while integrated protection circuitry includes automatic surge current shutdown, thermal shutdown, and inductive flyback clamp diodes.

The board mounts in a 6U form factor and complies with ANSI/IEEE STD 1014-1987, IEC 821, and IEC 297 VMEbus specifications.

Technical Specifications

• Channels: 128 digital outputs


• Output Type: High-voltage open-collector drivers


• Output Voltage Range: 5 to 48 VDC


• Breakdown Voltage: 55 V


• Current Sink: 600 mA per channel


• Data Access: 8-bit, 16-bit, or 32-bit transfers; addressable as sixteen 8-bit bytes, eight 16-bit words, or four 32-bit longwords


• Data Polarity: Positive true (logic 1 asserts output)


• Operating Temperature: 0 to +55 °C


• Storage Temperature: -20 to +85 °C


• Humidity: 20 to 80% relative, non-condensing


• Altitude: To 10,000 ft


• Cooling: Forced air convection


• Form Factor: Double Eurocard (6U), 160 × 233.35 mm

Key Features

• Integrated built-in test for channel-level diagnostics


• Automatic surge current shutdown protection


• Thermal shutdown protection


• Output clamp diodes for inductive load protection


• Fail LED for fault isolation


• Optional user-supplied warming resistor sockets


• Optional pull-up resistors for electronic switch outputs

Interfaces

• Two 96-pin female connectors (P3, P4) with IDC or discrete wire termination options


• Optional user ground connection via P2 connector (VMIACC-0132 accessory recommended)


• VMEbus slave addressing: 39/3D:29/2D with A24:A16:D32/D16/D08 (EO) mnemonics

Typical Applications Industrial automation, high-voltage switching control, and systems requiring channel-level built-in diagnostics and fault isolation.